• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Photodecomposition of lignins by solar energy using chlorophylls in plant biomasses

Research Project

Project/Area Number 18KT0094
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section特設分野
Research Field Agricultural Resources for the Next Generation
Research InstitutionKindai University

Principal Investigator

Saga Yoshitaka  近畿大学, 理工学部, 教授 (60411576)

Project Period (FY) 2018-07-18 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Keywordsクロロフィル / バイオマス / 太陽光 / リグニン
Outline of Final Research Achievements

Lignin is one of the abundant biomasses in nature. The utilization of lignin is promising to obtain carbon souses and aromatic compounds, but there are some difficulties for degradation of lignin. In this research project, photofunctional cyclic tetrapyrrole pigments were synthesized from naturally occurring chlorophyll and bacteriochlorophyll pigments, which were extracted from biomasses such as green leaves, cyanobacteria, and photosynthetic bacteria, and characterized by spectroscopic and light-induced single oxygen generation measurements to develop photodegradation of lignin by visible light. The reactivities of chlorophylls and bacteriochlorophylls in relation to some structural conversions were elucidated. The synthetic chlorophyll derivatives were applied to photodegradation of biomasses such as lignin. In addition, these photofunctional derivatives were immobilized on magnetic beads for reuse of the photocatalysts.

Academic Significance and Societal Importance of the Research Achievements

リグニンなどの地球上に豊富に存在しながらあまり利用されていないバイオマスの利活用はこれからの持続可能型社会を形成するうえで重要である。そこで、バイオマス分解に関する研究が精力的に行われてきたが、現在、環境低負荷型でのバイオマスの新たな分解法と利活用法の開発が求められている。そのような状況で、本研究では別の未利用バイオマスである植物の緑葉部分や藻類などに豊富に含まれているクロロフィル類が、リグニンなどのバイオマスの可視光分解のための光触媒の良いリード化合物となる可能性を示した。これは、未利用バイオマスの有効利用の新たな方向性のひとつとして意義があると考えられる。

Report

(5 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (21 results)

All 2022 2021 2020 2019

All Journal Article (10 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 10 results,  Open Access: 2 results) Presentation (11 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Isomerization kinetics of bacteriochlorophyll b and bacteriopheophytin b under acidic conditions2022

    • Author(s)
      Takashima Yusuke、Saga Yoshitaka
    • Journal Title

      Photochemical & Photobiological Sciences

      Volume: 21 Issue: 7 Pages: 1193-1199

    • DOI

      10.1007/s43630-022-00207-1

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effects of peripheral substituents on epimerization kinetics of formylated chlorophylls2022

    • Author(s)
      Tanaka Masayuki、Tanaka Aiko、Saga Yoshitaka
    • Journal Title

      Journal of Porphyrins and Phthalocyanines

      Volume: 26 Issue: 04 Pages: 273-278

    • DOI

      10.1142/s1088424622500109

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Spectral Properties of Chlorophyll <i>f</i> in the B800 Cavity of Light‐harvesting Complex 2 from the Purple Photosynthetic Bacterium <i>Rhodoblastus acidophilus</i>2021

    • Author(s)
      Saga Yoshitaka、Tanaka Aiko、Yamashita Madoka、Shinoda Toshiyuki、Tomo Tatsuya、Kimura Yukihiro
    • Journal Title

      Photochemistry and Photobiology

      Volume: 98 Issue: 1 Pages: 169-174

    • DOI

      10.1111/php.13491

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Energy Transfer Dynamics in Light-Harvesting Complex 2 Variants Containing Oxidized B800 Bacteriochlorophyll <i>a</i>2021

    • Author(s)
      Saga Yoshitaka、Otsuka Yuji、Tanaka Aiko、Masaoka Yuto、Hidaka Tsubasa、Nagasawa Yutaka
    • Journal Title

      The Journal of Physical Chemistry B

      Volume: 125 Issue: 25 Pages: 6830-6836

    • DOI

      10.1021/acs.jpcb.1c01592

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Excitation Energy Transfer from Bacteriochlorophyll b in the B800 Site to B850 Bacteriochlorophyll a in Light-Harvesting Complex 22021

    • Author(s)
      Saga Yoshitaka、Yamashita Madoka、Masaoka Yuto、Hidaka Tsubasa、Imanishi Michie、Kimura Yukihiro、Nagasawa Yutaka
    • Journal Title

      The Journal of Physical Chemistry B

      Volume: 125 Issue: 8 Pages: 2009-2017

    • DOI

      10.1021/acs.jpcb.0c09605

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] In situ formation of photoactive B-ring reduced chlorophyll isomer in photosynthetic protein LH22020

    • Author(s)
      Saga Yoshitaka、Otsuka Yuji、Funakoshi Daichi、Masaoka Yuto、Kihara Yu、Hidaka Tsubasa、Hatano Hiroka、Asakawa Hitoshi、Nagasawa Yutaka、Tamiaki Hitoshi
    • Journal Title

      Scientific Reports

      Volume: 10 Issue: 1 Pages: 19383-19383

    • DOI

      10.1038/s41598-020-76540-1

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Synthesis of C3/C13‐substituted semi‐synthetic bacteriochlorophyll‐a derivatives and their properties as functional dyes2020

    • Author(s)
      Sasaki Shin‐ichi、Hashimoto Yuki、Kinoshita Yusuke、Tamiaki Hitoshi、Duan Shengnan、Wang Xiao‐Feng、Saga Yoshitaka、Yamamoto Hiroaki、Ikeuchi Toshitaka、Shishioh Nobue
    • Journal Title

      ChemPhotoChem

      Volume: 4 Issue: 12 Pages: 5399-5407

    • DOI

      10.1002/cptc.202000169

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Reconstitution of 3-Acetyl Chlorophyll a into Light-Harvesting Complex 2 from the Purple Photosynthetic Bacterium Phaeospirillum molischianum2020

    • Author(s)
      Saga Yoshitaka、Yamashita Madoka、Imanishi Michie、Kimura Yukihiro、Masaoka Yuto、Hidaka Tsubasa、Nagasawa Yutaka
    • Journal Title

      ACS Omega

      Volume: 5 Issue: 12 Pages: 6817-6825

    • DOI

      10.1021/acsomega.0c00152

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Structural effects on epimerization of bacteriochlorophyll a and chlorophyll a revealed using 3-acetyl chlorophyll a2020

    • Author(s)
      Saga Yoshitaka、Nakagawa Shiori
    • Journal Title

      Journal of Porphyrins and Phthalocyanines

      Volume: 24 Issue: 04 Pages: 499-504

    • DOI

      10.1142/s1088424620500054

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] In situ Conversion of Chlorophyll b Reconstituted into Photosynthetic Protein LH22019

    • Author(s)
      Saga Yoshitaka、Yamashita Madoka、Nakagawa Shiori
    • Journal Title

      Chemistry Letters

      Volume: 48 Issue: 10 Pages: 1270-1273

    • DOI

      10.1246/cl.190545

    • NAID

      130007724091

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] クロロフィル誘導体の磁気ビーズへの固定化と光化学特性2022

    • Author(s)
      佐賀佳央、奥村勇
    • Organizer
      日本化学会第102春季年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] バクテリオクロロフィルbの異性化反応に対する中心金属の影響2021

    • Author(s)
      高島佑介、佐賀佳央
    • Organizer
      第28回光合成セミナー
    • Related Report
      2021 Annual Research Report
  • [Presentation] クロロフィルbとクロロフィルdのエピマー化反応特性2021

    • Author(s)
      田中雅之、田中愛子、佐賀佳央
    • Organizer
      第28回光合成セミナー
    • Related Report
      2021 Annual Research Report
  • [Presentation] Comparison of the Stability of Bacteriochlorophyll b and Bacteriopheophytin b under Weakly Acidic Conditions2021

    • Author(s)
      Y. Takashima, Y. Saga
    • Organizer
      16th International Workshop on Supramolecular Nanoscience of Chemically Programmed Pigments
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Epimerization of Formylated Chlorophylls: Effects of the Formyl Groups Connected with the Tetrapyrrole Macrocycle2021

    • Author(s)
      M. Tanaka, A. Tanaka, Y. Saga
    • Organizer
      16th International Workshop on Supramolecular Nanoscience of Chemically Programmed Pigments
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] クロロフィルのエピマー化反応特性に対するクロリン環に直結するホルミル基の影響2021

    • Author(s)
      田中雅之、田中愛子、佐賀佳央
    • Organizer
      第11回日本光合成学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Synthesis and properties of bacteriochlorophyll-a derivatives and their effects on photocytotoxicity in cultured cells2020

    • Author(s)
      獅子王信江、山下眞花、佐賀佳央、山本博章、池内俊貴、民秋均、佐々木真一
    • Organizer
      日本化学会第100春季年会
    • Related Report
      2019 Research-status Report
  • [Presentation] 紅色光合成細菌の光捕集タンパク質LH2への金属置換クロロフィル誘導体の再構成2019

    • Author(s)
      佐賀佳央、山下眞花
    • Organizer
      第31回配位化合物の光化学討論会
    • Related Report
      2019 Research-status Report
  • [Presentation] 3-アセチルクロロフィルaを利用したバクテリオクロロフィルaとクロロフィルaのエピマー化の反応性に対する構造要因の解明2019

    • Author(s)
      中川支央里、佐賀佳央
    • Organizer
      第27回光合成セミナー
    • Related Report
      2019 Research-status Report
  • [Presentation] バクテリオクロロフィルaとクロロフィルaのエピマー化反応に対する分子構造の影響の解析2019

    • Author(s)
      中川支央里、佐賀佳央
    • Organizer
      第10回日本光合成学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] Comparison of Epimerization Kinetics among Bacteriochlorophyll a, Chlorophyll a, and 3-Acetyl Chlorophyll a2019

    • Author(s)
      S. Nakagawa, Y. Saga
    • Organizer
      15th International Workshop on Supramolecular Nanoscience of Chemically Programmed Pigments
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

URL: 

Published: 2018-07-20   Modified: 2023-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi